LEGEND AND NOTES FOR ALL 50XJ WIRING DIAGRAMS

 

 

 

LEGEND

ALARM — Unit Alarm Relay (Critical Fault)

FREEZ — Freeze Thermostat

ALM-CMAlarm/Warning Relay Common

 

(Water Economizer)

BPS_S

Fan Start/Stop Relay

FRZ

Freeze Thermostat (DX Circuit)

 

(VFD Bypass Mode)

FSD

Fire Alarm/Shutdown

BYPAS

VFD Bypass Control

FU

Fuse

C

Compressor Contactor

GND

Ground

CB

Circuit Breaker

HEAT

Electric Heat Stage Control

CDWF

Condenser Waterflow Relay

HIR

Heat Interlock Relay

CDWFS

Condenser Waterflow Switch

HPS

High Refrigerant Pressure Switch

CH

Crankcase Heater

HRN

Harness

CLO

Compressor Lockout Control

HWV

Hot Water Valve

CMP

Compressor Control Relay

IFM

Indoor Fan Motor

COMP

Compressor

J

Jumper Wire

CSMUX

Signal Multiplexer-Comp Status

LPS

Low Refrigerant Pressure Switch

CUVL

UVC Light For Indoor Coil Area

MA_RA— Mixed/Return Air Temp. Sensor

DEHUM — External Dehumidification

MVLV

Modulating Valve (Econ)/

DHS

Duct High Static Limit Switch

 

Heat Pres. Ctl.

DISC1

Disconnect Switch

OLR

Compressor Motor Protector

DS

Door Switch

PCB1

Unit Control Board

DSP

Duct Static Pressure Transducer

PCB2,3— I/O Expansion Board

ECONO — Economizer Valve/Damper

PHASE— Phase/Rotation Monitor

 

Control

PUMP — Water Pump Request

EWT

Entering Water Temp. Sensor

RESET — External Reset

FLTS

Filter Status Switch

ROCC — Remote Occupancy

SAT

Supply Air Temp. Sensor

SPT

Space/Zone Temperature Sensor

SF

Supply Fan Start/Stop Relay

SPEED

0-10 VDC Signal Isolator for VFD

SW

Switch

TTransformer

TB1

Power Distribution Terminal Block

TB2

120 V-Hot Terminal Block

TB3

120 V-Neutral Terminal Block

TB5-7

Terminal Blocks for

TOWE

Field Connections

Tower Request

R

 

TRMCT

VAV Terminals Control

TRMOP

VAV Terminals Open

VENTR

Ventilation Output

VFD

Variable Frequency Drive

WARN — Unit Warning Relay

(Non-Critical Fault)

Optional Wiring

(Optional Items Noted With “*”)

Field Wiring

NOTES:

1.Partial wiring shown on both power and control diagrams.

2.All class 2 transformers are wired into separate circuits. Do not interconnect these transformers or circuits; circuit separation shall be maintained.

3.On 200/240 v units, the transformers are factory wired for 240 v. For 200 v applica- tions, move the blue wire to the 200 v tap of each transformer.

4.Shielded wire shall have drain wire connected to VFD ground screw. The floating end of the drain wire shall be insulated.

5.Shielded wire shall have drain wire connected to the control panel, adjacent to the PCB. The floating end of the drain wire shall be insulated.

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Carrier 50XJ064-104 specifications Heat, Cdwfs, Hrn, Ifm, Comp, Cuvl, Mvlv, DISC1, Speed, TB1, TB3, Towe, Trmct, Trmop

50XJ064-104 specifications

The Carrier 50XJ064-104 is a high-efficiency rooftop air conditioning system designed to deliver exceptional cooling and heating capabilities for diverse commercial applications. One of the standout features of this model is its robust cooling capacity of 64,000 BTUs, making it suitable for mid to large-sized spaces. The 50XJ064-104 is engineered using advanced technologies to ensure energy efficiency and reliable performance, contributing to reduced operational costs and environmental sustainability.

One of the primary technologies employed in the Carrier 50XJ064-104 is the high-efficiency scroll compressor. This component plays a pivotal role in optimizing energy usage while delivering consistent cooling output. The system also incorporates an economizer that allows for enhanced energy savings by utilizing outdoor air for cooling when conditions are favorable. This not only decreases reliance on the compressor but also improves indoor air quality.

The microprocessor-based controls in the 50XJ064-104 provide precise temperature regulation, ensuring optimal comfort levels in various applications. These controls allow for easy programming and can be integrated into building management systems for centralized oversight. Additionally, the unit features a built-in fault detection and diagnostic system that aids in identifying potential issues before they escalate, minimizing downtime and maintenance costs.

The Carrier 50XJ064-104 is designed with durability in mind. It features a weather-resistant cabinet, designed to withstand harsh outdoor conditions and prolong service life. The high-quality insulation within the unit not only enhances energy efficiency but also minimizes noise levels, making it an ideal choice for urban environments where sound control is critical.

Another important characteristic is its environmentally friendly R-410A refrigerant, which has a lower impact on ozone depletion compared to older refrigerants. This aligns with Carrier's commitment to creating sustainable HVAC solutions that comply with current environmental regulations.

Overall, the Carrier 50XJ064-104 stands out for its combination of efficiency, advanced technologies, and durable construction. Whether for commercial buildings, retail spaces, or industrial applications, this rooftop air conditioning unit is designed to provide reliable performance and comfort year-round.